Charles a



(No Model.)

0. A. GIPFORD. MEANS FOR OPENING 0R CLOSING AIR I1\TL T 0R DRAFT DOORS. No. 529,166.

Patented Nov. 13, 1894.

STATES PATENT OFFICE.

CHARLES A. GIFFORD, OF AKRON, OHIO, ASSIGNOR TO THE TAPLIN,

RICE & COMPANY, OF SAME PLACE.

MEANS FOROPENING OR CLOSING AIR-INLET OR DBAFT DOORS.

SPECIFICATION forming part of Letters Patent No. 529,166, dated November 13, 1894.

Application filed March 19,1s94. Serial No. 504, (1% model .To all whom it may concern.- I

Be it known that 1, CHARLES 'A. GIFFORD, of Akron, in the county of Summit and State of Ohio, have invented certain new and use ful Improvements in Means for Opening and Closing Air-Inlet or Draft Doors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in draft-doors, dampers or air-inlet doors for stoves, furnaces, &c., more especially. designed for use on an ash-pit door; and it consists in certain features of construction and combination of parts hereinafter described and pointed out in the claim.

In the accompanying drawings, Figures 1 and 2 are outer side elevations of an ash-pitdoor provided with a draft-door or damper embodying my invention, the'draft-door or damper being shown in its closed position in Fig. 1,- and in its open position in Fig. 2. Figs.

3 and 4 are sections on lines 3-3 and 4-A,

respectively, Fig. 1. Fig. 5 is a side elevation of the cam-shaft employed for opening and closing the dampers or air-inlet-door.

Referring to the drawings, A represents the ash-pit-door or casing provided with a draftopening, a, the draft or air-supply through which is regulated or cut ofi by means of a door or damper, B,'that is hinged at or near opposite ends, as at C, to the upper portion of the ash-pit-door, door or damper B having, preferably, upwardly-projecting lugs or ears, B, that are pivoted at or near their outer end to outwardly-projecting lugs or ears, A, of the ash-pit-door. The draft-opening a, is preferably provided with a flange a extending all round the outer end of the opening, and door or damper B, on its inner side and extending all round the same, is provided with an inwardly-proj ecting flange b that, when the door or damper is in its closed position as shown in Fig. 3, is adapted to fit over external flange a of the ash-pit-door, and bear upon the flat surface a formed upon the ashpit-door, or casing having the draft-opening, next outside of flange a.

The means employed for opening and closing the draft-door or air-inlet door or damper is as followszThe draft-door or damper at the top, and centrally between the hinges, is provided with an upwardly-proj ectin g flange, B and D designates a cam-shaft that has suitable bearing in casing or wall containing draft or air-inlet opening, and has a cam D, preferably integral therewith and adapted to engage the back or inner side of flange B the trend and arrangement of said cam being such that the draft-door or air-inlet-door shall 7 positively actuated to close or open according as cam-shaft D is turned in the one direction or the other. I would also remark that cam-shaft D is preferably provided with a lat orally-projecting lug or member D adapted to engage a lug a formed upon the outer side of easing A, and the arrangement of parts is such that lug or member D in conjunction with lug a forms a stop to limit the movement I of the cam-shaft in the direction required to open the air-inlet or draft-door. I would also remark that the ash-pit-door or casing provided with the draft-opening or air-inlet-opening is preferably provided with raised portions or lugs a at the rear or inner side of lugs or ears B of door B, the size of lugs or members aibeing such that they, in the closed position of door B, shall afford bearing for ears B and avoid any strain upon the axial pin of hinges C in closing door B. The cam-shaft is, of course, provided with an arm or lever d for turning the shaft.

What I claim is The combination of the air-inlet or draftdoor or damper having hinged lugs or ears B at two points located a suitable interval apart, the part provided with the draft or air- I00 inlet opening, raised portions or lugs a at the In testimony whereof I sign this specificarear or inner side of lugs or ears B, and means tion, in the presence of two witnesses, this 10 for forcing the door closed, the size of said 13th day of January, 1894. lugs or members a being such that they, in

5 the closed position of the door or damper, 7 CHARLES (IIFFORD shall afford bearing for ears B and avoid any Vvitnesses: strain upon the axial pin of the hinges, sub- C. H. DORER, stantially as set forth. WARD HOOVER. 

